Datasheet

56F8356 Technical Data, Rev. 13
162 Freescale Semiconductor
Preliminary
ADC reference circuit power-up time
4
t
VREF
—— 25ms
Conversion time t
ADC
—6 —
t
AIC
cycles
3
Sample time t
ADS
—1 —
t
AIC
cycles
3
Input capacitance C
ADI
—5 —pF
Input injection current
5
, per pin
I
ADI
—— 3mA
Input injection current, total I
ADIT
—— 20mA
V
REFH
current I
VREFH
—1.2 3mA
ADC A current I
ADCA
—25 —mA
ADC B current I
ADCB
—25 —mA
Quiescent current I
ADCQ
—0 10
μA
Uncalibrated Gain Error (ideal = 1) E
GAIN
— +/- .004 +/- .015 —
Uncalibrated Offset Voltage V
OFFSET
—+/- 15+/- 35mV
Calibrated Absolute Error
6
AE
CAL
—See Figure 10-22 — LSBs
Calibration Factor 1
7
CF1 — 0.010380 — —
Calibration Factor 2
7
CF2 — -31.7 — —
Crosstalk between channels — — -60 — dB
Common Mode Voltage V
common
—(V
REFH
- V
REFLO
) / 2 — V
Signal-to-noise ratio SNR — 64.6 — db
Signal-to-noise plus distortion ratio SINAD — 59.1 — db
Total Harmonic Distortion THD — 60.6 — db
Spurious Free Dynamic Range SFDR — 61.1 — db
Effective Number Of Bits
8
ENOB — 9.6 — Bits
1. INL measured from V
in
= .1V
REFH
to V
in
= .9V
REFH
10% to 90% Input Signal Range
2. LSB = Least Significant Bit
3. ADC clock cycles
4. Assumes each voltage reference pin is bypassed with 0.1μF ceramic capacitors to ground
5. The current that can be injected or sourced from an unselected ADC signal input without impacting the performance of
the ADC. This allows the ADC to operate in noisy industrial environments where inductive flyback is possible.
6. Absolute error includes the effects of both gain error and offset error.
7. Please see the 56F8300 Peripheral User’s Manual for additional information on ADC calibration.
8. ENOB = (SINAD - 1.76)/6.02
Table 10-24 ADC Parameters (Continued)
Characteristic Symbol Min Typ Max Unit